Prince Harry has been wearing the Oura Ring since 2018, a smart ring that tracks your heart rate, sleep, body biometrics and more. I tried the wearable tech, and I’ve seen a major change in my approach to wellness Prince Harry has been wearing the Oura Ring since 2018, a smart ring that tracks your heart rate, sleep, body biometrics and more. I tried the wearable tech, and I’ve seen a major change in my approach to wellness